Measuring and testing – Inspecting
Reexamination Certificate
2004-11-16
2009-10-13
Rogers, David A. (Department: 2856)
Measuring and testing
Inspecting
C073S579000, C073S598000, C073S602000, C073S606000, C073S624000
Reexamination Certificate
active
07600442
ABSTRACT:
A flaw Z with a long probing length inside a probing target is allowed to be probed. The waves other than the probing target waves are removed or reduced, so that the individual difference in the sizing result due to the ability of the measuring personnel is eliminated to improve the precision of the probing. A transmission probe31and a receiving probe32for transmitting and receiving a wide band ultrasonic wave are included. Each time the positions of the probes31and32are moved, a received wave Gj(t) is obtained. From a spectrum Fj(f) corresponding to the received wave Gj(t), a narrowband spectrum FAj(f) is extracted. A component wave GAj(t) corresponding to the narrow band spectrum FAj(f) is obtained by inverse Fourier transformation. The component wave GAj(t) is provided for a comparative display using a predetermined sizing coefficient. The position of a flaw Z is determined inside a probing target30right below the line segment connecting the centers of the transmission probe31and the receiving probe32, based on at which of the measurement points a wave is generated on the comparative display screen.
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Dohi Nobuki
Hirose Masayuki
Kameyama Masashi
Okumura Mitsuo
Zhang Hong
Greenblum & Bernstein P.L.C.
H&B System Co., Ltd.
Kozo Keikaku Engineering Inc.
Rogers David A.
The Kansai Electric Power Co. Inc.
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